Seasonal occurrence of zoo-phytophagous mirid bug, Nesidiocoris tenuis (Reuter) on sesame in relation to weather parameters

Abstract

The investigation on seasonal occurrence of zoo-phytophagous mirid bug, Nesidiocoris tenuis (Reuter) on sesame in relation to weather parameters was under taken at Agriculture College Vishweswaraiah Canal Farm, Mandya during 2022-23. In summer 2022, the occurrence of mirid bug, N. tenuis varied between 0.00 to 5.60/bugs per plant with a mean of 1.86/ bugs per plant and zero population was noticed January second week. The bug population progressively decreasing from March third week (2.30/bugs per plant) and no activities was observed from April first week onwards. Likewise, in kharif 2022, the densities of mirid bug, N. tenuis was in between 0.00 to 7.30/bugs per plant, with an average population of 2.90/bugs per plant and no occurrence was noticed in August first week. The multi linear regression statistical analysis (MLR) clearly indicated 68 per cent (R2 = 0.68) of l mirid bug, N. tenuis population influenced by afternoon RH positively in summer 2022. Similarly, in kharif 2022, 63 per cent (R2 = 0.63) of mirid bug, N. tenuis densities found influencing by morning RH positively and sunshine hours negatively.